Hi Howard,
1. I am using a cluster which involves 20 ubuntu 14.04 servers, and each sever
is equipped with infiniBand RDMA for communication and data transfer.
2. Open MPI v2.0.1
3. I just use prefix option to indicate the install directory with ./configure
command, and use make all & sudo make install command further.
4. the test app program, which has client and server sides, is very simple. I
hope to run them by ./server and ./client command
server side:
#include “mpi.h"
#include
using namespace std;
int main(int argc, char **argv) {
MPI_Comm client;
MPI_Status status;
MPI_Init(&argc, &argv);
int number = 0;
char myport[MPI_MAX_PORT_NAME];
MPI_Open_port(MPI_INFO_NULL, myport);
MPI_Comm_accept(myport, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &client);
MPI_Recv(&number, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, client,
&status);
}
client side:
#include “mpi.h"
#include
using namespace std;
int main(int argc, char **argv) {
MPI_Comm server;
MPI_Init(NULL, NULL);
char name[] = "3808886785.0:2871653702”;
MPI_Comm_connect(name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &server);
int number = -1 ;
MPI_Send(&number, 1, MPI_INT, 0, 0, server);
}
On 18 November 2016 at 11:24:26 PM, Pritchard Jr., Howard (howa...@lanl.gov)
wrote:
Hello Rui,
Note there is no standard for the format of the port_name so don’t
read much what it looks like when printed out.
Could you provide some more information about your particular setup:
- characteristics of the system you are using, e.g. a Linux cluster, laptop
running os-x, etc.
- what version of Open MPI you are using
- if possible, the configure options used to build/install Open MPI
- the client/server test app (if its concise)
Thanks,
Howard
--
Howard Pritchard
HPC-DES
Los Alamos National Laboratory
From: devel on behalf of Rui Liu
Reply-To: Open MPI Developers
Date: Thursday, November 17, 2016 at 6:58 PM
To: "devel@lists.open-mpi.org"
Subject: [OMPI devel] Developing MPI program without mpirun
Hi folks,
I am working on a simple client/server program but I don’t want to use mpirun
to start the program (In nature, I just want to adopt MPI API into my own
project but cannot start it using mpirun). I mostly followed the singleton mode
of MPI, using APIs like MPI_Open_port, MPI_Comm_connect, and MPI_Comm_accept.
But it doesn’t work, especially the port_name is something like
4034413554.0:228712872, which really confuse me.
Anyone knows how to achieve that? I attach my server and client key source code
for your reference.
server side:
char myport[MPI_MAX_PORT_NAME];
MPI_Open_port(MPI_INFO_NULL, myport);
cout << myport << endl; (assume myport is 4034413554.0:228712872, it always
return string like this)
MPI_Comm_accept(myport, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &client);
MPI_Recv(&number, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, client, &status);
client side:
char name[] = "4034413554.0:228712872";
MPI_Comm_connect(name, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &server);
int number = -1 ;
MPI_Send(&number, 1, MPI_INT, 0, 0, server);
Best,
Rui
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